Generic Name: Orphenadrine (or-FEN-a-dreen) Brand Name: Norflex Plus Norflex is used for: Short-term treatment of painful muscle conditions. It is used along with rest and physical therapy. It may also be used for other conditions as determined by your doctor. Norflex is a skeletal muscle relaxant. It works by helping to decrease pain, which helps muscles to relax. Norflex may also be used for other purposes not listed in this medication guide. Please consult your physician before taking any medication.